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2. 100 mm anti-tank gun T-12 - Wikipedia

   en.wikipedia.org/wiki/100_mm_anti-tank_gun_T-12

   The T-12 was designed by the construction bureau of the Yurga Machine-Building Plant as a replacement for the BS-3 100 mm gun. The first serial examples were produced in 1955, [2] but the T-12 entered service only in 1961. Its special feature was the use of a smoothbore gun.

3. Duct (industrial exhaust) - Wikipedia

   en.wikipedia.org/wiki/Duct_(industrial_exhaust)

   Industrial exhaust ducts are pipe systems that connect hoods to industrial chimneys through other components of exhaust systems like fans, collectors, etc. Ducts are low-pressure pneumatic conveyors to convey dust, particles, shavings, fumes, or chemical hazardous components from air in the vicinity to a shop floor or any other specific locations like tanks, sanding machines, or laboratory hoods.

4. D-10 tank gun - Wikipedia

   en.wikipedia.org/wiki/D-10_tank_gun

   The D-10 is a high-velocity gun of 100 mm calibre (bore diameter), with a barrel length of 53.5 calibres. A muzzle velocity of 895 m/s gave it good anti-tank performance by late-war standards. A muzzle velocity of 895 m/s gave it good anti-tank performance by late-war standards.

5. Smoothbore - Wikipedia

   en.wikipedia.org/wiki/Smoothbore

   A smooth-bore, cast-iron ship's cannon, from the Grand Turk, a replica of a mid-18th century three-masted frigate Replica of "Twin Sisters" smoothbores used in the Battle of San Jacinto (1836) USS Monitor (1862) with the muzzle of one of its two 11-inch smoothbore Dahlgren guns showing

6. Underground pneumatic boring - Wikipedia

   en.wikipedia.org/wiki/Underground_pneumatic_boring

   Underground pneumatic boring is a trenchless method of installing underground utilities. The process creates an open-air chamber, referred to as a borehole . The borehole is then used to run utilities.

7. Underground mine ventilation - Wikipedia

   en.wikipedia.org/wiki/Underground_mine_ventilation

   An auxiliary ventilation system takes air from the flow-through system and distributes it to the mine workings via temporarily mounted ventilation fans, Venturi tubes and disposable fabric or steel ducting. Auxiliary fan and duct systems may be either forcing systems, where fresh air is pushed into mine headings, or exhausting systems that draw ...

8. Panhard ERC - Wikipedia

   en.wikipedia.org/wiki/Panhard_ERC

   Panhard designed a turret which mounted the long barrel F4 90mm smooth bore-cannon developed by GIAT, and designated the vehicle the ERC 90 F4 Sagaie. [5] The F4 90mm could fire APFSDS (Armour Piercing Fin Stabilised Discarding Sabot) rounds at a much higher velocity than the Lynx's F1 90mm. GIAT and Panhard both claimed it could penetrate ...

9. Boring (manufacturing) - Wikipedia

   en.wikipedia.org/wiki/Boring_(manufacturing)

   Boring machines come in a large variety of sizes and styles. Boring operations on small workpieces can be carried out on a lathe while larger workpieces are machined on boring mills. Workpieces are commonly 1 to 4 metres (3 ft 3 in to 13 ft 1 in) in diameter, but can be as large as 20 m (66 ft).